Mason County, Washington — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Mason County, WA?
In Mason County, Washington, public U.S. EPA records track 452 regulated facilities (#23 of 75 in Washington), including 16 (3.5%) High-Risk sites and $1,000 in federal penalties. Countywide due diligence also covers 240 Safe Drinking Water (SDWIS) facilities, 130 Clean Water NPDES permits, 6 FEMA Federal Disaster Declarations (5 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
Mason County, WA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Mason County, WA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Mason County
Top EPA Regulated Facilities in Mason County, WA
100% of High-Risk & penalized facilities have facility names, street names, and dockets redacted (3 Low-Risk compliant records shown as Free Previews).
| Facility Name / Hazard Type | Sector Location (Street Redacted) | Risk Tier & Score | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| 🔒 Locked High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • SHELTON, WA (ZIP 98584 Sector) | HIGH (66/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • SHELTON, WA (ZIP 98584 Sector) | HIGH (64/100) | Violation Identified (4 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • SHELTON, WA (ZIP 98584 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • BELFAIR, WA (ZIP 98528 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • BELFAIR, WA (ZIP 98528 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • SHELTON, WA (ZIP 98584 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • SHELTON, WA (ZIP 98584 Sector) | HIGH (64/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • SHELTON, WA (ZIP 98584 Sector) | HIGH (64/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| BELFAIR TRUCK & PAINT FREE PREVIEW (LOW RISK) | NE 23530 HWY 3, BELFAIR, WA 98528 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| SUNRISE FIBERGLASS ENGINEERING SITE FREE PREVIEW (LOW RISK) | 171 W SANDERSON WAY, SHELTON, WA 98584 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| WILSON RECYCLING FREE PREVIEW (LOW RISK) | 2278 E BROCKDALE RD, SHELTON, WA 98584 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| QWEST COMMUNICATIONS INC W00335 FREE PREVIEW (LOW RISK) | 522 RAILROAD AVENUE, SHELTON, WA 98584 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Mason County, Washington Environmental Due Diligence
How many EPA-regulated environmental sites are in Mason County, Washington?
Public U.S. EPA records track 452 regulated facilities in Mason County, Washington (ranking #23 of 75 jurisdictions in WA). Of those, 16 (3.5%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 54 (11.9%) have active non-compliance quarters.
Which ZIP codes and cities in Mason County have the highest regulated facility density?
Within Mason County, the highest concentrations of EPA-tracked facilities are located in ZIP 98528 (Belfair, 83 sites), ZIP 98557 (Mccleary, 18 sites), ZIP 98592 (Union, 14 sites), spanning municipal corridors including Belfair (83 sites), Mccleary (18 sites), Union (14 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Mason County?
Across Mason County, 129 facilities (28.5% of regulated sites) are registered Resource Conservation and Recovery Act (RCRA) hazardous waste generators or handlers, and 0 industrial sites report toxic chemical releases to the EPA Toxics Release Inventory (TRI).
What is the EPA Radon Zone classification for Mason County, WA?
Geologic indoor air screening places Mason County in EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L). Counties in EPA Radon Zone 2 have a predicted average indoor radon level between 2.0 and 4.0 pCi/L. Testing basement or ground-floor living areas is recommended during home inspection.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in Mason County, WA?
Federal records track 240 Safe Drinking Water (SDWIS) facilities, 130 Clean Water Act NPDES permits, and 35 impaired water dischargers in Mason County, alongside 6 historical FEMA federal disaster declarations (5 flood/storm events).
Does Mason County, WA have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Mason County indicates a MODERATE shrink-swell risk signal and steel pipe corrosivity rated High. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.